将金( I )配合物固定在有序介孔聚合物FDU-15上,合成了一系列新型非均相金( I )催化剂,并通过XRD、N 2吸附-脱附、FT-IR、TEM、EDS等对其进行了表征。这些催化剂中的一部分通过烯丙醇的胺化反应进行了评估。在所研究的催化剂中,FDU-( p -CF 3 Ph) 2 PAuCl ( 3d ) 被确定为最有效的催化剂。与均相催化剂相比,非均相金的催化活性增强(I)催化剂与FDU-15的介孔结构密切相关。该催化体系适用于广泛的底物,并且可以很容易地回收和再循环至少十二次而不会显着损失催化活性。此外,进一步检查了3d的催化性能,用于分子内环化合成杂环化合物。
Cationic Gold(I)-Mediated Intramolecular Cyclization of 3-Alkyne-1,2-diols and 1-Amino-3-alkyn-2-ols: A Practical Route to Furans and Pyrroles
摘要:
The intramolecular cyclizations of the 3-alkyne-1,2-diols and the 1-amino-3-alkyn-2-ols with a low catalyst loading (0.05-0.5 mol %) of (Ph3P)AuCl-AgNTf2 or (Ph3P)AuCl-AgOTf proceeded at room temperature to provide a variety of substituted furans and pyrroles in excellent yields (85-98% yields). This method is also fully applicable to the conversion of several dozen grams of the substrate using only 0.05 mol % each of the Au and Ag catalysts.
Reusable and Durable Immobilized-Cationic Gold(I) Catalysts for Environmentally Benign Bond-Forming Reactions
作者:Masahiro Egi、Kenji Azechi、Shuji Akai
DOI:10.1002/adsc.201000753
日期:2011.2.11
Polystyrene-immobilized cationic goldcatalysts 2a and 2b were synthesized for the first time and found to be highly effective catalysts for the bond-formingreactions via the activation of the CC triple bonds. The immobilized 2a was easily and quantitatively recovered from the reaction mixture and reused at least seven times while maintaining the original catalytic activity. Furthermore, a flow reactor
Cu-Catalyzed Synthesis of Tetrasubstituted 2,3-Allenols through Decarboxylative Silylation of Alkyne-Substituted Cyclic Carbonates
作者:Kun Guo、Arjan W. Kleij
DOI:10.1021/acs.orglett.0c01222
日期:2020.5.15
An efficient and mild Cu-catalyzed protocol has been developed for the decarboxylative silylation of alkyne-functionalized cyclic carbonate substrates affording 2,3-allenols featuring four different substituents. This practical methodology gives access to a wide scope of tetrasubstituted functionalized allenes in excellent yields.
Cationic Gold(I)-Mediated Intramolecular Cyclization of 3-Alkyne-1,2-diols and 1-Amino-3-alkyn-2-ols: A Practical Route to Furans and Pyrroles
作者:Masahiro Egi、Kenji Azechi、Shuji Akai
DOI:10.1021/ol901942t
日期:2009.11.5
The intramolecular cyclizations of the 3-alkyne-1,2-diols and the 1-amino-3-alkyn-2-ols with a low catalyst loading (0.05-0.5 mol %) of (Ph3P)AuCl-AgNTf2 or (Ph3P)AuCl-AgOTf proceeded at room temperature to provide a variety of substituted furans and pyrroles in excellent yields (85-98% yields). This method is also fully applicable to the conversion of several dozen grams of the substrate using only 0.05 mol % each of the Au and Ag catalysts.
Highly efficient mesoporous polymer supported phosphine-gold(<scp>i</scp>) complex catalysts for amination of allylic alcohols and intramolecular cyclization reactions
gold(I) catalysts were synthesized by immobilizing gold(I) complexes on ordered mesoporous polymer FDU-15 and characterized by XRD, N2 adsorption–desorption, FT-IR, TEM, EDS, etc. The catalytic activities of these catalysts were evaluated by the amination reactions of allylic alcohols. Among the catalysts investigated, FDU-(p-CF3Ph)2PAuCl (3d) was identified as the most efficient catalyst. Compared
将金( I )配合物固定在有序介孔聚合物FDU-15上,合成了一系列新型非均相金( I )催化剂,并通过XRD、N 2吸附-脱附、FT-IR、TEM、EDS等对其进行了表征。这些催化剂中的一部分通过烯丙醇的胺化反应进行了评估。在所研究的催化剂中,FDU-( p -CF 3 Ph) 2 PAuCl ( 3d ) 被确定为最有效的催化剂。与均相催化剂相比,非均相金的催化活性增强(I)催化剂与FDU-15的介孔结构密切相关。该催化体系适用于广泛的底物,并且可以很容易地回收和再循环至少十二次而不会显着损失催化活性。此外,进一步检查了3d的催化性能,用于分子内环化合成杂环化合物。